Looking up - 08 March 2019

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What is the universe made of? Well about a quarter of the matter of the universe, we think, is matter we can't detect with any of our instruments today. It has mass but is invisible. Prof Matthew Bershady of the Universities of Cape Town and Wisconsin tries to explain Dark Matter and how we use hydrogen gas in galaxies to infer its existence. This is one of the big puzzles astronomers are grappling with today.
8 Mar 2019 English South Africa Places & Travel

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